i got a 2005 evo 8 and i want to upgrade my fuel injectors. can anyone tell me what CC i can go before i have to get a tune? thanks

 

WHAT are up upgrading for? New turbo? New mods?

 

im gettin busher stage 3 head. and turnin up boost to 28 psi. dont want boost to stall..

also have a question for u. i was drivin my evo home the other night a was at 4000 rpm's and like 15lbs of boost when the engine cut out for a second. now i have this tiny tick all the time. the tick speeds up when i rev my engine. but the weird part is my engine runs and idols fine. any ideas?

 

I personally would adjust the fuel map, but only after scaling them properly.

 

what u mean scaling them?

 

Tiny tick can lead to a big problem, could be cam related or something internal. Take it to a shop to investigate.

As far as the head upgrade and boost, you are pushing the limits on a stock non meth/e85'd motor. 93 oct and 28psi stock turbo you may consider alternate fuel or have a nice race intercooler(garret core - buschur race/ams)

 

New injectors require scaling, do a search for an explanation...

 

You can't. Your ECU is programmed for 560cc injectors only.
Even if you stepped up to the next size injector, 650cc's, your car would run like crap. Any injector upgrade requires changing injector scaling, latncies, and fuel maps. And if you you can do this, you have the right monitoring equipment, and you are tuning anyway.
You also can't raise the boost that high with out changing the boost limit in the ECU.
The good news is that you can get the Burshur stuff you want, or need, with the stock injectors if you just just keep the boost down and everything you need to know about changing things in the ECU can be found here;
https://www.evolutionm.net/forums/ecuflash-179/

 

l dude im runnin 27lbs right now with no problems.

 

I am looking into injectors too. But not until I change the turbo. But I would think you need a tune with any injector change as others have said.

You might not be having a problem now, but you are not monitoring and running efficiently.

Good Luck

 

im going for the upgrade two and this was berry helpful tnx guy keep it up

 

at 27psi ur probably maxing out your stock injectors might wanna turn it down till u upgrade